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Part Number: MC34921
Description: The 34921 power IC integrates multiple motor drivers, multiple power regulators, and most other analog...
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MC34921
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DataSheet
General Description
MC34921 General Description
The 34921 power IC integrates multiple motor drivers, multiple power regulators, and most other analog functions a small consumer motion-enabled product needs. The 34921’s circuitry is fully protected with current limiting, short-circuit shutdown, over-temperature, overvoltage, and under-voltage detection. Supervisory functions can be read and programmed through a 8-MHz Serial Interface.
A 5.0 V dual-mode (linear or switching) voltage regulator, 3.3 V switching buck regulator, and a voltage-selectable (1.5 V, 1.8 V, 2.5 V) linear regulator provide power management. Two H-Bridges and a configurable motor driver are provided for controlling two dc motors and one unipolar stepper motor.
The highly integrated 34921 brings together sensing,\ communication, power management, system protection, and motorcontrol in one device.
MC34921 Maximum Ratings
| Rating | Symbol | Max | Unit |
| Input Power Supply Voltage IB+ = 0.0 A |
B+ | -0.3 to 38 | V |
| Logic Input Voltage | VIN | -0.3 to V5.0+0.3 | V |
| Boost Supply Voltage | VBOOST | B+ +15 | V |
| Input Power Supply Ripple Voltage Ripple Voltage Measured at < 20 MHz |
VRIPPLEB | 400 | mVPP |
| Motor Drivers A & B Maximum Output Voltage | VOUTMAX | 40 | V |
| 5.0 V Linear Regulator Maximum Output Voltage Startup |
V5.0 | 5.4 | V |
| 5.0 V Switching Regulator Maximum Output Voltage Startup |
V5.0 | 5.4 | V |
| 3.3 V Switching Regulator Maximum Output Voltage Startup |
V3.3 | 3.6 | V |
| VCORE Linear Regulator Maximum Output Voltage ICORE = 0.0 A |
VCORE | VCORE_NOM+10% | V |
| Motor Drivers A, B, and C (Motor Driver C Configured as Step Motor Driver)(1) Motor Driver A Sink or Source Current Motor Driver B Sink or Source Current Motor Driver C Sink or Source Current |
IPWM(A) IPWM(B) IPWM(C) |
±4.5 ±4.5 ±1.5 |
A |
| Motor Driver C in Step Mode Step Motor Output Current Output x or x On |
ISTEP | 2.0 | A |
| Motor Driver C in Step Mode Standoff Voltage Output Off, IDSS = 10 mA |
VBVDS | 60 | V |
| ESD Voltage(2) Non-Operating, Unbiased, Human Body Model Machine Model Charge Device Model |
VESD | ±2000 ±200 ±250 |
V |
1. B+ = 34 V, Motor Stalled and Saturated
2. ESD testing is performed in accordance with the Human Body Model (CZAP = 100 pF, RZAP = 1500 ), the Machine Model (CZAP = 200 pF, RZAP = 0 ), and the Charge Device Model.
MC34921 Features
· Two Functionally Identical Pulse-Width Modulated (PWM) DC Motor Drivers
· ·One Switching, One Linear, and One Dual-Mode Regulator
· Dual Mode Switching/Linear 5.0 V Regulator
· Supervisory Functions (Power-ON Reset and Error Reset Circuitry)
· 8-Channel, 8-Bit Analog-to-Digital Converter (ADC)
· Charge Pump for High-Side MOSFET Drive
· Complete Support for Analog Quadrature Encoder
· Pb Free package is designated by suffix AE
· ·One Switching, One Linear, and One Dual-Mode Regulator
· Dual Mode Switching/Linear 5.0 V Regulator
· Supervisory Functions (Power-ON Reset and Error Reset Circuitry)
· 8-Channel, 8-Bit Analog-to-Digital Converter (ADC)
· Charge Pump for High-Side MOSFET Drive
· Complete Support for Analog Quadrature Encoder
· Pb Free package is designated by suffix AE
MC34921 Connection Diagram
MC34921
PDF/DataSheet Download
- Datasheet: MC34921
- File Size: 617489 KB
- Manufacturer: ETC [ETC]
- Click here to Download
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